As a 'courtesy' to you, I'll point out that it seems everyone in the world except you knows cartridge brass springs back a bit after it's formed, including after sizing and again after firing. That spring back in diameter is typically a thou or so, in shoulder length it can be as much as two thou.

For goodness sake fellow, forget repeatedly telling the world what you do and how long you've been doing it, what tools and lathes you have, how many feeler gages and ogives you keep under your bed. If you can't provide relivant information, at least avoid meaningless chatter that only serves to confuse new guys who try to make some kind of sense out of your nonsense.